<?xml version="1.0"?><rdf:RDF xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:edm="http://www.europeana.eu/schemas/edm/" xmlns:wgs84_pos="http://www.w3.org/2003/01/geo/wgs84_pos" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:rdaGr2="http://rdvocab.info/ElementsGr2" xmlns:oai="http://www.openarchives.org/OAI/2.0/" xmlns:owl="http://www.w3.org/2002/07/owl#" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:ore="http://www.openarchives.org/ore/terms/" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:dcterms="http://purl.org/dc/terms/"><edm:WebResource rdf:about="http://www.dlib.si/stream/URN:NBN:SI:doc-3MO9Y4EV/41ba47e5-0902-407f-aa2d-4efa4cab8583/PDF"><dcterms:extent>1740 KB</dcterms:extent></edm:WebResource><edm:WebResource rdf:about="http://www.dlib.si/stream/URN:NBN:SI:doc-3MO9Y4EV/19d2b34e-41a7-4360-8609-7026a89a4acf/TEXT"><dcterms:extent>29 KB</dcterms:extent></edm:WebResource><edm:WebResource rdf:about="http://www.dlib.si/stream/URN:NBN:SI:doc-3MO9Y4EV/0be9ebf6-efc5-4eb4-b8fc-02843b89a77a/PDF"><dcterms:extent>111 KB</dcterms:extent></edm:WebResource><edm:WebResource rdf:about="http://www.dlib.si/stream/URN:NBN:SI:doc-3MO9Y4EV/b647f5ff-8457-431c-a29c-c12e59bab443/TEXT"><dcterms:extent>3 KB</dcterms:extent></edm:WebResource><edm:ProvidedCHO rdf:about="URN:NBN:SI:doc-3MO9Y4EV"><dcterms:issued>2025</dcterms:issued><dc:creator>Graver, Jack E.</dc:creator><dc:creator>Hartung, Elizabeth J.</dc:creator><dc:format xml:lang="sl">letnik:1</dc:format><dc:format xml:lang="sl">številka:1, article   p1.05</dc:format><dc:format xml:lang="sl">str. 1-11</dc:format><dc:identifier>DOI:10.26493/2820-6657.7.9ae</dc:identifier><dc:identifier>ISSN:2820-6657</dc:identifier><dc:identifier>COBISSID_HOST:285430787</dc:identifier><dc:identifier>URN:URN:NBN:SI:doc-3MO9Y4EV</dc:identifier><dc:language>en</dc:language><dc:publisher xml:lang="sl">University of Primorska</dc:publisher><dc:source xml:lang="sl">Discrete mathematical chemistry</dc:source><dc:subject xml:lang="en">chemical graph theory</dc:subject><dc:subject xml:lang="en">Clar number</dc:subject><dc:subject xml:lang="sl">Clarovo število</dc:subject><dc:subject xml:lang="en">Fries number</dc:subject><dc:subject xml:lang="sl">Friesovo število</dc:subject><dc:subject xml:lang="sl">fulereni</dc:subject><dc:subject xml:lang="en">fullerenes</dc:subject><dc:subject xml:lang="en">Kekulé structure</dc:subject><dc:subject xml:lang="sl">Kekuléjeva struktura</dc:subject><dc:subject xml:lang="sl">kemijska teorija grafov</dc:subject><dc:subject xml:lang="en">leapfrog fullerenes</dc:subject><dc:subject xml:lang="en">perfect matching</dc:subject><dc:subject xml:lang="sl">popolno prirejanje</dc:subject><dc:subject xml:lang="sl">preskakovalni fulereni</dc:subject><dc:title xml:lang="sl">Clar numbers of leapfrog fullerenes|</dc:title><dc:description xml:lang="sl">A fullerene is a 3-regular plane graph with only hexagonal and pentagonal faces. The Fries number of a fullerene G, F(G), is the maximum number of benzene rings over all possible Kekulé structures for G. The Clar number of G, C(G), is the maximum number of independent benzene rings possible over all possible Kekulé structures for G. In this paper, we show that for leapfrog fullerenes, any set of faces attaining the Clar number is a subset of faces attaining the Fries number. This property is false for fullerenes in general (as shown in paper from E. J. Hartung in 2014). We then show that if L(G) is the leapfrog of a fullerene G, then the Clar number of L(G) is equal to the vertex independence number of G</dc:description><dc:description xml:lang="sl">Fuleren je 3-regularen planarni graf, ki ima le šestkotna in petkotna lica. Friesovo število fulerena G,F(G), je največje število benzenovih obročev v vseh možnih Kekuléjevih strukturah za G. Clarovo število G, C (G), je največje število neodvisnih benzenovih obročev v vseh možnih Kekuléjevih strukturah za G. V tem članku pokažemo, da je za preskakovalne fulerene vsaka množica lic, ki doseže Clarovo število, podmnožica množice lic, ki doseže Friesovo število. Ta lastnost ne velja za fulerene v splošnem. Nato pokažemo, da če je L (G) preskakovalni fuleren od G, potem je Clarovo število L (G) enako vozliščnemu neodvisnostnemu številu grafa G</dc:description><edm:type>TEXT</edm:type><dc:type xml:lang="sl">znanstveno časopisje</dc:type><dc:type xml:lang="en">journals</dc:type><dc:type rdf:resource="http://www.wikidata.org/entity/Q361785" /></edm:ProvidedCHO><ore:Aggregation rdf:about="http://www.dlib.si/?URN=URN:NBN:SI:doc-3MO9Y4EV"><edm:aggregatedCHO rdf:resource="URN:NBN:SI:doc-3MO9Y4EV" /><edm:isShownBy rdf:resource="http://www.dlib.si/stream/URN:NBN:SI:doc-3MO9Y4EV/41ba47e5-0902-407f-aa2d-4efa4cab8583/PDF" /><edm:rights rdf:resource="http://creativecommons.org/licenses/by-sa/4.0/" /><edm:provider>Slovenian National E-content Aggregator</edm:provider><edm:intermediateProvider xml:lang="en">National and University Library of Slovenia</edm:intermediateProvider><edm:dataProvider xml:lang="sl">Univerza na Primorskem</edm:dataProvider><edm:object rdf:resource="http://www.dlib.si/streamdb/URN:NBN:SI:doc-3MO9Y4EV/maxi/edm" /><edm:isShownAt rdf:resource="http://www.dlib.si/details/URN:NBN:SI:doc-3MO9Y4EV" /></ore:Aggregation></rdf:RDF>